to me, filter size does matter. my 2.8 uses an Fl1A. yeah, big honker. today i saw an F350 trident v10. the filter on that was just a little over 1/2 the size of mine! idk, but that just seems so wrong on so many different levels! my engine is now 27 years old and i just wonder if his v10 will last that long.
just my $.02.